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Design of a synchronous reluctance rotor for the stator of an 11 kW induction machine

Auslegung eines synchronen Reluktanzrotors für den Stator einer 11-kW-Asynchronmaschine

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Abstract

This paper first describes a general method for the design of a synchronous reluctance rotor, which uses the field lines in an anisotropic rotor to shape the flux barriers and combines this with known design rules from the literature. This straightforward method is now used to design a rotor for the stator of a three-phase, four-pole, 11 kW standard induction machine. In some electromagnetic studies the influence of the essential rotor parameters (number of flux barriers, ratio of the magnetically non-conductive material in the rotor and the used method for the radial width ratios of adjacent barriers) is analyzed by means of finite element simulations in order to find a suitable rotor topology. In addition, the dimensioning of the mechanical ribs is discussed to manufacture a prototype rotor, which is then inserted into the stator of the cage induction machine. Finally, both the reluctance rotor and the squirrel cage rotor of the induction machine are used to present measurement results for the heating at the rated point and the efficiency at normalized operating points, so that both types of machines can be compared.

Zusammenfassung

Dieser Beitrag beschreibt zunächst ein allgemeines Verfahren zur Auslegung eines synchronen Reluktanzläufers, welches zur Formgebung den Verlauf der Feldlinien in einem anisotropen Rotor nutzt und dies mit bekannten Auslegungsregeln aus der Literatur kombiniert. Diese direkte Methode wird nun dazu genutzt, einen Rotor für den Stator einer dreiphasigen, vierpoligen 11 kW Normalsynchronmaschine zu gestalten. In einigen elektromagnetischen Studien wird der Einfluss der wesentlichen Rotor-Parameter (Anzahl der Flussbarrieren, Anteil des nichtleitfähigen Materials im Rotor und die Methode zur Bestimmung der Breitenverhältnisse der benachbarten Barrieren) mit Hilfe von Finite-Elemente-Simulationen analysiert, um eine geeignete Rotortopologie zu finden. In Ergänzung dazu wird auf die Dimensionierung der mechanisch bedingten Stege eingegangen, um einen Prototyp-Rotor fertigen zu können, der anschließend in den Stator der Käfigläufer-Asynchronmaschine eingesetzt wird. Abschließend werden sowohl für den Reluktanzläufer als auch den Käfigläufer der Asynchronmaschine Messergebnisse für die Erwärmung im Bemessungspunkt und den Wirkungsgrad in normierten Betriebspunkten vorgestellt, sodass beide Maschinentypen gegenübergestellt werden können.

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  1. Institut für Elektrische Energiewandlung, Technische Universität Darmstadt, Landgraf-Georg-Straße 4, 64283, Darmstadt, Deutschland

    Sascha Neusüs & Andreas Binder

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  1. Sascha Neusüs
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  2. Andreas Binder
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Correspondence to Sascha Neusüs.

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Neusüs, S., Binder, A. Design of a synchronous reluctance rotor for the stator of an 11 kW induction machine. Elektrotech. Inftech. 135, 177–186 (2018). https://doi.org/10.1007/s00502-018-0603-x

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